The following is a list of the Strata in pit B, from the surface to the greatest depth that has been hitherto attained, viz. 216 feet.
| Ft | In. | ||
| 1. | Soil and gravel | 4 | 0 |
| 2. | Blue and grey clunch with balls and measures of ironstone | 12 | 6 |
| 3. | Coal (not worked) | 2 | 0 |
| 4. | Clunch mixed with ironstone, and including a bed of the same 15 inches thick | 35 | 6 |
| ────── | |||
| 54 | 0 | ||
The open-work, and the six pits called by the miners Stone-pits (marked a, a in the plan) are for the purpose of procuring the ironstone contained in the beds ahead) mentioned, and therefore on an average do not exceed the depth of 54 feet. |
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| 5. | Coal (not worked) | 0 | 10 |
| 6. | Fire clay | 5 | 10 |
| 7. | Rock binds (slaty clayey sandstone) | 27 | 2 |
| 8. | First coal or Yard-coal | 2 | 2 |
| ────── | |||
| 80 | 2 | ||
The Yard coal is the first coal which has been worked: it is soft, and applicable only to domestic purposes or to the roasting of the ironstone: its thickness varies from 26 inches to a yard. The three pits marked d in the plan are sunk into this bed: their average depth does not exceed 90 feet. |
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| 9. | Sandstone, the upper part of the bed slaty, the lower compact | 38 | 4 |
| 10. | Strong coal | 4 | 1 |
| This is the second workable coal; it is of good quality and is coaked for the use of the furnace. | |||
| 11. | Alternations of compact sandstone, slaty sandstone, slaty clay, and clay | 28 | 2 |
| 12. | Coal and bituminous slate (not worked) | 1 | 6 |
| 13. | Brown clay | 11 | 0 |
| 14. | Sandstone and indurated clay | 5 | 6 |
| 15. | Black slaty clay in closing three beds of ironstone of 9, 8, and 5 inches in thickness | 10 | 10 |
| 16. | Trap (Green rock) | 12 | 0 |
| ────── | |||
| 200 | 7 | ||
The pits A & C are sunk into the trap, the one to the depth of half a yard, the other to the depth of five yards, but neither of them passes through this bed. |
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| 17. | Indurated sandstone | 3 | 0 |
| 18. | Carbonaceous slaty clay and blind coal | 4 | 4 |
| 19. | Slaty clay | 1 | 6 |
| 20. | Strong hard bituminous coal | 4 | 6 |
The above two beds of coal, with the thin interposed bed of slaty clay, form the third coal which is worked. |
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| 21. | Fire clay | 2 | 0 |
| ────── | |||
| 218 | 21 | ||
The Engine pit, the Bye pit, and the pit marked B, terminate in this bed. |
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